Dust collector



15, 1933- K. F. JUENGLING El AL 1,922,299

DUST COLLECTOR Filed June 26, 1930 2 Sheets-Sheet l //v:/ wraes 16422.JE/SGLI/VG.

HAW/VA. 55ers 1933- K. F. JUENGLING ET AL 1,922,299

DUST COLLECTOR Filed June 26, 1950 2 Sheets-Sheet 2 Q@ m QMA -W PatentedAug. 15, 1.933

* D ATESMENT OF IC Q i r 1,922,299

$1,922,299 a j nus'rcoLLnc'ron Karl F. Jue ngling fl Lakewood; Ohio, andItalian A. Berg, Birmingham, Ala.

Application June 26, 1930. Serial No; 464,075

10 Claims. (01. ce-s6) Although our invention is capable of generalapplication for dust-collecting purposes, it particularly relates toapparatus of this nature adapted to remove dustfrorngas, particularlyfor cleaning gas from blast furnaces. i

It is well known that dust-laden gas is dis charged from blast furnacesunder considerable pressure andv hence travels through dust collec torsat a high velocity. These dust collectors usually consistof' or areprovided with a curved passageway through which the dust-laden gastravels and in which the dust is separated from the gas by centrifugalaction. The main purpose of ouhinventionispositively to remove the dustwhich has been centrifugally sep-- settling in a quietfarea into astorage bin. In the eventthat our invention is utilized for separatingdust from a carrier under circum-- i In saidannexed drawings stanceswherein the carrier is not given a high velocity at its source, which,as stated; is

or inducing the rapid travel of the dust-laden carrier throughsuctiondevice. V V j The annexed drawings and the following de scriptionset forth in detail certain means cmthe passageway by a suitable bodyingour invention; such means disclosing,

howeven but two of the variousfornis inwhich theprinciple of theinvention may be applied.

Figure 1 tea central vertical section of our improved dustcollector, theview"also showing atraclc and car running thereupon and into whichthedust accumulated in the several storage binsmayjbe discharged,the-sectiOn being taken in the planeindicated by the line 1-1,

Figure 2 is a plan section, taken in the planes indicated byythe line22,Figure1;

Figure 3yis a central vertical secticin of "a modified form ofapparatus, taken in the plane and centrifugal action.

'ticular over-all dimension of the casing 2 and easing wall, which openinto comparatively charge pipe l (If iguresl and 2) from a blast furnace(not shown) feeds the dusteladen gas at a high velocity into a casing 2comprised of a plurality of turns which form a spiralpassaga way fromthe outside to the central area of the casing, the pipe 1 dischargingtangentially into the casing 2. The dust in the gas under-thecentrifugal action follows the line of the outer wall of the casing 2 asit traverses the spiral path. By reason of the spiral arrangement, theover-all diameter of each succeeding inner spiral turn is smaller thanthe adjacently. outer one;

and furthermore, the cross sectionof the spiral passageway graduallydecreases, as is evident from an inspectionof Figure 2. The inner end 70of theinnermost turn of the casingZ opens at the segmentalarea 23 into acentral chamber 24 which coniinunicates adjacent the top of the casing 2with'an exitpassageway 4. Through this ,latterpassageway the cleaned gaspasses frcm the apparatus: V c

' Wedirectparticular attention to the fact. that the cur ved passagewayis closed; That is, the pathway of the dustladenjgas from the pipe l tothe. exit 23 is" provided in a separate 80 chamber which is ofcomparatively restricted cross-section, and thus maintains the velocityThis arrangement is essentially an improvement over those construe tionsin which the dust-laden gas travels in a comparatively large openchamber and is not caused necessarily to follow a definitefrestrictedpathway. The dust-laden gas in our apparatus does not enter any suchcomparatively large open chamber until his dischargedthrough the exit 23into the central chamber 2%. l The requirements incidentj to theoperation of blast furnacesof differentsiz es will govern thepartheparticlllar cross-section or gradual decrease in cross-section ofthe curved passageway in said casing; j I l The essence of our inventionis the provision of means for collecting the dust which is following theouter Wall of the various casing turns} into quiet chambers where it maysettle into storage bins without further disturbance or agitation. Forthis purpose we have formed a pluralityof spaced vertical ports 5 in thenarrow vertical chambersx 6 which discharge into separate andindependent bins '7. construction is plainly seen in Figure 1. Thesechambers 6- are closed to any influence which would induce agitation ofthe dust so that the be directedthrough the ports 5 into the settlingchambers 6, we speed up the travel of the dust-laden gas and hence thecentrifugal action adjacently forward of each port 5 by a vane 20 whichis secured at its inner end to" the casing 2, and extends outwardly anydesired amount and is adjustable by a: handle 25 or other suitableoperating means. This construction creates a restrictedipassage:openeing 26 which increases the velocity of the gas travel, as will,be-readily understood. Further more, we provide lips 21 at the farsides of the ports 5 which;slightly extend into the gas passageway andserve positivelytov direct the dusttending to slide acrossthe. ports 5,through.

said ports and into the chambers 6.

In Figures 3 and v4, we showadiiferentform of construction-in which adischarge pipe llfrom the blast. furnace feeds the dust-laden gastangentially intoacasing 12icomprised of aplurality of. turns wound inhelicalformation and dis. charging. at the bottom intoa chamber 13'whichcommunicates adjacent its top with a gas-exit.

pipe 14. Thisformof constructionalsois provided With spaced casingports15 and casing lips 22. adapted to cause the :dust which-is travelingalong the outerwall of the helix-under centrifu gal action-torescapeinto and settle throughthe passageways 16-into the bins 17. A-bin 18isalso provided at the bottomof the centralchamber 13, the bins l7.and18 being adapted tobe emp tied into the car 19. This form.of.construction also isprovidedwith adjustable vanes 2'7 which are operatedby handles 23 and serve to: narrow upthe cross-sectionlofe thepassageway, to whatever extent desired, adjacently forward. of the portsl5; In-the form of constructionshowniin Figures 3 and 4-, the over-alldiameter of. each. turn of the helix. is-- the same as that of eachother turn, and the crossesectional area of the passageway throughthecasinglZ is the same from itsouter end toits-innen end,incontradistinction to the varying over-all dimensions and varyingcross-sectional areas=ofthe formof device shown inFigures 1 and2.

Ourimproved apparatus progressively increases the dust separating effectas the gases pass-from theentrance to the GXlt1Ofzth dust collector;first, byprogressively increasing the velocityof the gases through thecurved passageway and, secondly, by gradually decreasing the radius ofthe; passageway as the gases-pass from the inlet to the outlet of thecollector.

What weclaim-is: r

1; In a dust collector, provided with means for 'inducing'the flow ofaldust-laden carrier 'the combination of acurved. conduitin which: theseparation of I dust from the'carrier is effected by centrifugal action,means comprising.- a'plurality of exit ports and'separatespeed modifyingelements'ior the carrier cooperating with and located adj acentlyforwardly: of: the respective exit ports to provide for the successiveremoval of separated dust from the outer'area of the con- I duit,separate and independent closed settling chamberscommunicatingrespectively; with said last-mentioned means, and meansforming an exit from the conduit for the clean carrier.

2. In a dust collector, provided with means for inducing the flow of adust-1aden carrier the combination of a curved conduit in which theseparation or" dust from the carrier is effected by centrifugal action,means comprising a plurality of exit ports and separate adjustable speedmodifying elements for the carrier cooperating with and located adjacently forwardly of the respective exit ports to provide for thesuccessive removal ofseparated dust from the outer area of theconduit;-v separate and independent closed settling chamberscommunicating respectively with said lastementioned means, and meansforming an exit from the conduit for the clean carrier.

3..In'a dust-collector, provided with means for inducing the flow of adust-laden carrier the combination of a curved conduit in which theseparation of dust from the carrier is effected by centrifugal action,means comprising a plurality of exit ports and aseparate speedincreasing element for the carrier cooperating with each respective exitport to provide for the successive removal of. separateddust from theouter area of the conduit, dust-intercepting lips disposed adjacent thefar ends of said exit ports and adapted positively to direct the dustthrough said ports, separate and'independent closed settling chamberscommunicating respectively with said ports, and means forming an exitfrom the .conduit for the cleancarrier.

4. In a dust collector, provided with means for inducing the flow of adust-laden carrier the" combinationof a curved conduit in which theseparation of dust from the carrier is eifected bycentrifugalaction,.means providing for the successive removal ofseparated dust from the outer area of the conduit, means restricting thecross" section of the conduit adjacent the near ends of said removalmeans, separate and independent closed settling chambers communicatingrespectively with said lasts-mentioned means, and means forming an exitfrom the conduit for the clean carrier.

5. In dust collector, provided. with means for inducing the flow of adust-laden carrier the combination of. av curved conduit inwhich theseparation of dust from the. carrier is effected by centrifugal action,means providingfor the successive removal of separated dust from theouter area of the conduit, means adjustably restricting thecross-section of the conduit adjacent the near ends of saidremovalmeans, separate and independent'closedsettling chamberscommunicatingrespectively with said lastmentioned means, andmeansforming an exit from the conduit for. the clean carrier.

6'; In a. dust collector provided with means for. inducing theflow ofdust-laden gas; the

combination of means forming a spiral conduit comprised of a-pluralityof communicating turns whose cross-sectionconstantly decreases toincrease the speed of the gas, a plurality. of exitports on the outerwall of said conduit to receive dust separated by, centrifugal actionfrom the gas, means adjacently forwardly of the respective exit portsfor locally increasing the speed of. the gas, means for carryingv to apoint of discharge separated dust from said exit ports, andmeans-forminganexit fromthe conduit for purified gas.

7. In a dust collector provided with means for inducing the flow ofdust-laden gas; the

combinationof means forming a spiral conduit 3 comprised of a pluralityof communicating turns whose cross-section constantly decreases toincrease the speed of the gas, a plurality of exit it of said exitports, means for carrying separated dust away from said exit ports,andineans forming an exit from the conduit for purified gas. v 1

8. In a dust collector, provided with means for inducing the flow ofdust-laden gas the combination of means forming a spiral conduitcomprised of a plurality of communicating turns M wrapped in an inwardlywound coil and in which the separation 'of the dust from the gas isefiected by centrifugal action, the cross-section of the conduitconstantly decreasing from end to end to increase the speed of the gasespassing therethrough, means for successively taking oil separated. dustfrom the conduit, means "in said conduit adjacentlyrforwardly of thelast-mentioned means for locally increasingthe speed of gas, and meansforming an exit from the conduit for purified gas.

9. In a dustcollector, provided with meansfor inducing the flow of dustladen gas the combination of means forming a spiral conduit --com risedof a plurality of communicating turns Wrapped in an inwardly wound coilandin which the separation of the dust from the gas iseffectedbycentrifugal action, the cross-sec tion of the conduitwconstantlydecreasing from end to end, means for successively taking off separateddust from the conduit, means substantially opposite said dust take-01fmeans forming baffles adaptedtodecrease the effective cross-section ofthe conduit adjacently forwardly of the several dust take-off means, and

means forming an exit from the conduit for 10. Ina dust collector,provided with means for inducing the flow of dust-laden gas thecombination of a casing formed with a conduit of coil formation whosecross-section gradually decreases from its outer end to its inner endand in which conduit the. separation of the dust from the gas iseffected by centrifugal action, said casing having an entrance openingfor dust-laden gas and an upper discharge open- .ing for purified gas, aplurality of dust-discharge openings formed in the respective outerwalls of the turns of the conduit, closed settling cham-" bers intowhich said dust-discharge openings severally feed, a dust bin withinsaid casing and lying below said discharge openingfor purified gas andbelow the exit from said conduit, a plurality of adjustable bafllesrestricting the effective cross-section of the conduit adjacentlyforwardly of the several dust-discharge openii ings, and dust-directinglips disposed adjacent the far ends of the several dust-dischargeopenings.

KARL F. JUENGLING.

HAKON A.' BERG.

